What is the current water temperature in Holyhead?

Q: What is the current water temperature in Holyhead?

As of now, in Holyhead, the water temperature is 8.95°C. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration.

United Kingdom > Holyhead

Water temperature in Holyhead

Detailed information about the current water temperature in Holyhead. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

48.1

°F

March 31, 05:27

Trend:

increasing

Yesterday:

47.9°F

Tomorrow:

48.2°F

Sunrise:

06:56

Sunset:

19:51

Day Length:

12 h. 55 min.

Holyhead in April

Minimum:

47.9°F

Average:

49.3°F

Maximum:

50.9°F

Sea water temperature in Holyhead today

As of now, in Holyhead, the water temperature is 48.1°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 1.0°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 48.4°F on 2025, while the historical minimum was 44.7°F on 2018.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 48.3°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Holyhead

Date	Current Year actual* / forecast**	last year	10 years average
Mar 17	46.7°F	47.5°F	46.3°F
Mar 18	47.2°F	47.2°F	46.3°F
Mar 19	47.5°F	47.5°F	46.5°F
Mar 20	47.8°F	47.6°F	46.5°F
Mar 21	47.7°F	47.9°F	46.7°F
Mar 22	47.9°F	47.6°F	46.7°F
Mar 23	47.2°F	47.4°F	46.7°F
Mar 24	47.3°F	47.7°F	46.8°F
Mar 25	46.8°F	47.7°F	46.8°F
Mar 26	47.2°F	48.2°F	47.0°F
Mar 27	47.0°F	47.9°F	47.0°F
Mar 28	47.4°F	47.8°F	47.0°F
Mar 29	47.5°F	48.3°F	47.1°F
Mar 30	47.9°F	48.3°F	47.0°F
Mar 31	48.1°F	48.4°F	47.1°F
Apr 1	48.2°F	48.4°F	47.2°F
Apr 2	48.2°F	48.7°F	47.3°F
Apr 3	48.3°F	48.7°F	47.3°F
Apr 4	48.2°F	48.6°F	47.2°F
Apr 5	48.3°F	49.0°F	47.4°F
Apr 6	48.5°F	48.9°F	47.5°F
Apr 7	48.6°F	49.1°F	47.6°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Holyhead by month

In an average year, Holyhead offers no days when the water temperature is warm enough to swim comfortably.

The warmest water in Holyhead was recorded on August 29, 2025, reaching a 63.3°F. While the coldest temperature occurred on March 9, 2018, dipping to 43.0°F. The average readings by season are 48.5°F in Winter, 48.6°F in Spring, 58.2°F in Summer, and 57.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Caernarfon	47.5°F	19mi
Bangor	46.1°F	21mi
Conwy	46.7°F	33mi
Douglas	47.5°F	59mi
Aberystwyth	48.5°F	66mi

* current water temperature in this city

** straight line distance from Holyhead